Home / 739,792,420.69-1,020,905,412.97-400,692,459.87

Finding the Fourth Proportional to 739,792,420.69, 1,020,905,412.97 and 400,692,459.87

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Solution

The fourth proportional to 739,792,420.69, 1,020,905,412.97 and 400,692,459.87 is: 552,951,192.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,792,420.69 : 1,020,905,412.97 = 400,692,459.87 : x
  2. Step 2: Convert to fraction form
    739,792,420.69/1,020,905,412.97 = 400,692,459.87/x
  3. Step 3: Cross multiply
    739,792,420.69x = 1,020,905,412.97 × 400,692,459.87
  4. Step 4: Simplify right side
    739,792,420.69x = 409,069,101,217,547,520
  5. Step 5: Solve for x
    x = 409,069,101,217,547,520/739,792,420.69
  6. Step 6: Final answer
    x = 552,951,192.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.