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Finding the Fourth Proportional to 819,547.30, 1,230,319.35 and 520,027.30

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Solution

The fourth proportional to 819,547.30, 1,230,319.35 and 520,027.30 is: 780,674.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,547.30 : 1,230,319.35 = 520,027.30 : x
  2. Step 2: Convert to fraction form
    819,547.30/1,230,319.35 = 520,027.30/x
  3. Step 3: Cross multiply
    819,547.30x = 1,230,319.35 × 520,027.30
  4. Step 4: Simplify right side
    819,547.30x = 639,799,649,718.26
  5. Step 5: Solve for x
    x = 639,799,649,718.26/819,547.30
  6. Step 6: Final answer
    x = 780,674.46

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Double scale
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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.