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Finding the Fourth Proportional to 708,022.48, 977,070.60 and 390,070.48

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Solution

The fourth proportional to 708,022.48, 977,070.60 and 390,070.48 is: 538,297.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,022.48 : 977,070.60 = 390,070.48 : x
  2. Step 2: Convert to fraction form
    708,022.48/977,070.60 = 390,070.48/x
  3. Step 3: Cross multiply
    708,022.48x = 977,070.60 × 390,070.48
  4. Step 4: Simplify right side
    708,022.48x = 381,126,397,935.89
  5. Step 5: Solve for x
    x = 381,126,397,935.89/708,022.48
  6. Step 6: Final answer
    x = 538,297.03

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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.