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Finding the Fourth Proportional to 708,415.36, 977,568.80 and 390,463.36

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Solution

The fourth proportional to 708,415.36, 977,568.80 and 390,463.36 is: 538,814.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,415.36 : 977,568.80 = 390,463.36 : x
  2. Step 2: Convert to fraction form
    708,415.36/977,568.80 = 390,463.36/x
  3. Step 3: Cross multiply
    708,415.36x = 977,568.80 × 390,463.36
  4. Step 4: Simplify right side
    708,415.36x = 381,704,798,279.17
  5. Step 5: Solve for x
    x = 381,704,798,279.17/708,415.36
  6. Step 6: Final answer
    x = 538,814.97

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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.