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Finding the Fourth Proportional to 315,526.20, 473,289.30 and 289,721.40

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Solution

The fourth proportional to 315,526.20, 473,289.30 and 289,721.40 is: 434,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,526.20 : 473,289.30 = 289,721.40 : x
  2. Step 2: Convert to fraction form
    315,526.20/473,289.30 = 289,721.40/x
  3. Step 3: Cross multiply
    315,526.20x = 473,289.30 × 289,721.40
  4. Step 4: Simplify right side
    315,526.20x = 137,122,038,601.02
  5. Step 5: Solve for x
    x = 137,122,038,601.02/315,526.20
  6. Step 6: Final answer
    x = 434,582.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.