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Finding the Fourth Proportional to 663,510.72, 915,688.80 and 377,031.36

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Solution

The fourth proportional to 663,510.72, 915,688.80 and 377,031.36 is: 520,328.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,510.72 : 915,688.80 = 377,031.36 : x
  2. Step 2: Convert to fraction form
    663,510.72/915,688.80 = 377,031.36/x
  3. Step 3: Cross multiply
    663,510.72x = 915,688.80 × 377,031.36
  4. Step 4: Simplify right side
    663,510.72x = 345,243,393,600.77
  5. Step 5: Solve for x
    x = 345,243,393,600.77/663,510.72
  6. Step 6: Final answer
    x = 520,328.28

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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.