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Finding the Fourth Proportional to 338,417.76, 507,627.81 and 85,698.18

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Solution

The fourth proportional to 338,417.76, 507,627.81 and 85,698.18 is: 128,547.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,417.76 : 507,627.81 = 85,698.18 : x
  2. Step 2: Convert to fraction form
    338,417.76/507,627.81 = 85,698.18/x
  3. Step 3: Cross multiply
    338,417.76x = 507,627.81 × 85,698.18
  4. Step 4: Simplify right side
    338,417.76x = 43,502,779,434.39
  5. Step 5: Solve for x
    x = 43,502,779,434.39/338,417.76
  6. Step 6: Final answer
    x = 128,547.57

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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.