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Finding the Fourth Proportional to 709,970.04, 979,798.50 and 387,710.10

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Solution

The fourth proportional to 709,970.04, 979,798.50 and 387,710.10 is: 535,061.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,970.04 : 979,798.50 = 387,710.10 : x
  2. Step 2: Convert to fraction form
    709,970.04/979,798.50 = 387,710.10/x
  3. Step 3: Cross multiply
    709,970.04x = 979,798.50 × 387,710.10
  4. Step 4: Simplify right side
    709,970.04x = 379,877,774,414.85
  5. Step 5: Solve for x
    x = 379,877,774,414.85/709,970.04
  6. Step 6: Final answer
    x = 535,061.70

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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.