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Finding the Fourth Proportional to 660,913.12, 912,068.40 and 359,112.16

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Solution

The fourth proportional to 660,913.12, 912,068.40 and 359,112.16 is: 495,579.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,913.12 : 912,068.40 = 359,112.16 : x
  2. Step 2: Convert to fraction form
    660,913.12/912,068.40 = 359,112.16/x
  3. Step 3: Cross multiply
    660,913.12x = 912,068.40 × 359,112.16
  4. Step 4: Simplify right side
    660,913.12x = 327,534,853,191.74
  5. Step 5: Solve for x
    x = 327,534,853,191.74/660,913.12
  6. Step 6: Final answer
    x = 495,579.29

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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.