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Finding the Fourth Proportional to 707.20, 973.92 and 510.40

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Solution

The fourth proportional to 707.20, 973.92 and 510.40 is: 702.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.20 : 973.92 = 510.40 : x
  2. Step 2: Convert to fraction form
    707.20/973.92 = 510.40/x
  3. Step 3: Cross multiply
    707.20x = 973.92 × 510.40
  4. Step 4: Simplify right side
    707.20x = 497,088.77
  5. Step 5: Solve for x
    x = 497,088.77/707.20
  6. Step 6: Final answer
    x = 702.90

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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.