Finding the Fourth Proportional to 1,291,192,278.08, 1,782,395,148.21 and 868,051,345.55
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Solution
The fourth proportional to 1,291,192,278.08, 1,782,395,148.21 and 868,051,345.55 is: 1,198,280,483.06
Step by Step Solution
- Step 1: Write the proportion equation
1,291,192,278.08 : 1,782,395,148.21 = 868,051,345.55 : x - Step 2: Convert to fraction form
1,291,192,278.08/1,782,395,148.21 = 868,051,345.55/x - Step 3: Cross multiply
1,291,192,278.08x = 1,782,395,148.21 × 868,051,345.55 - Step 4: Simplify right side
1,291,192,278.08x = 1,547,210,506,696,570,112 - Step 5: Solve for x
x = 1,547,210,506,696,570,112/1,291,192,278.08 - Step 6: Final answer
x = 1,198,280,483.06
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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.