Home / 645,317.52-890,501.61-358,831.45

Finding the Fourth Proportional to 645,317.52, 890,501.61 and 358,831.45

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Solution

The fourth proportional to 645,317.52, 890,501.61 and 358,831.45 is: 495,167.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,317.52 : 890,501.61 = 358,831.45 : x
  2. Step 2: Convert to fraction form
    645,317.52/890,501.61 = 358,831.45/x
  3. Step 3: Cross multiply
    645,317.52x = 890,501.61 × 358,831.45
  4. Step 4: Simplify right side
    645,317.52x = 319,539,983,943.64
  5. Step 5: Solve for x
    x = 319,539,983,943.64/645,317.52
  6. Step 6: Final answer
    x = 495,167.07

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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.